Thin Film Transistor Array Panel Storage Electrode Repair
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Solution Overview
Problem
The existing methods for repairing defective pixels in liquid crystal displays, particularly due to disconnection of data lines, result in increased repair times and reduced image quality due to laser-generated impurities causing short-circuits between electrodes.
Innovation Solution
A thin film transistor array panel design with storage electrode lines and connection bridges that allow for reduced laser cuts during repair, minimizing impurity generation and maintaining image quality by strategically cutting and short-circuiting data lines, and a method for manufacturing a color filter with recesses to prevent common electrode and pixel electrode short-circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser cutting and laser short-circuiting processes are performed to repair disconnected data lines, then defective pixels can be repaired, but repair time increases and laser-generated impurities cause short-circuits between electrodes
Solution Approach 1:
The patent applies preliminary action by pre-configuring the storage electrode line structure with connection parts and connection bridges before defects occur. The connection parts are positioned to enable direct laser short-circuiting to them, and connection bridges are pre-formed to provide alternative current paths. This preparation allows repair technicians to quickly restore functionality by performing minimal laser operations on pre-identified target areas, significantly reducing repair time while maintaining pixel reliability.
2Reliability
If laser cutting and laser short-circuiting processes are performed to repair disconnected data lines, then defective pixels can be repaired, but laser-generated impurities cause short-circuits between electrodes
Solution Approach 1:
The patent applies the extraction principle by removing the harmful effect of laser-generated impurities through the recess structure. The color filter layer is formed with recesses at data line positions, which physically extract or remove the impurities from the path between electrodes. When laser repair is performed, impurities fall into these recesses rather than causing short-circuits between the common electrode and pixel electrode, thus maintaining electrode isolation while still allowing successful repair.
3Reliability
If multiple laser processes are performed for repair, then disconnected data lines can be repaired, but the number of repair operations increases
Solution Approach 1:
The patent applies merging by combining multiple repair functions into a single integrated structure. The connection parts are designed to serve dual purposes: they connect storage electrodes during normal operation and serve as laser short-circuiting targets during repair. The connection bridges merge alternative current paths with the main data line structure. This integration allows repair technicians to perform repairs with fewer discrete operations, reducing the complexity of the repair process while maintaining data line connectivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the number of repair operations and minimizes image quality degradation by reducing impurity-induced short-circuits, thereby maintaining consistent luminance across pixels.
Implementation Method 1
cutting a portion between the left second storage electrode and first connection part, a portion between the left second storage electrode and second connection part, and a portion between the connection bridge and second bent part using a laser, and short-circuiting the data line to the first connection part using the laser
Data Source
AI summary
A thin film transistor array panel includes: a substrate; a gate line and a storage electrode that are disposed on the substrate; a data line that crosses the gate line and storage electrode line; a thin film transistor that is connected with the gate line and data line; and a pixel electrode that is connected to the thin film transistor. The storage electrode includes a first storage electrode that is parallel to the gate line, second storage electrodes that extend on opposing sides of the data line from the first storage electrode, a connection part that crosses the data line and connects pairs of the second storage electrodes, and a connection bridge that crosses the gate line and connects a second storage electrode to a second storage electrode of an adjacent pixel.